Graph View 是一个灵活，美观的android 图表库，现在只有折线图和条形图两种图表样式，易于使用，整合和定制。可以使用在android 1.6以上的版本。

功能概述

• Two chart types
  Line Chart and Bar Chart.
• Draw multiple series of data
  Let the diagram show more that one series in a graph. You can set a color and a description for every series.
• Show legend
  A legend can be displayed inline the chart. You can set the width and the vertical align (top, middle, bottom).
• Custom labels
  The labels for the x- and y-axis are generated automatically. But you can set your own labels, Strings are possible.
• Handle incomplete data
  It's possible to give the data in different frequency.
• Viewport
  You can limit the viewport so that only a part of the data will be displayed.
• Scrolling
  You can scroll with a finger touch move gesture.
• Scaling / Zooming
  Since Android 2.3! With two-fingers touch scale gesture (Multi-touch), the viewport can be changed.
• Background (line graph)
  Optionally draws a light background under the diagram stroke.
• Custom Style
  change the color and thickness, label font size/color and more
• Realtime / Live
  append new data live or reset the whole data
• BarChart: Value dependent color
• GraphViewDataInterface
  You can use your own model as data. Just implement GraphViewDataInterface.
• .. and may more
  Take a look at the GraphView-Demo project.

项目主页：http://www.open-open.com/lib/view/home/1395109849431